Message-ID: <41A32ABC.1090000@draigBrady.com>
Date: Tue, 23 Nov 2004 12:19:08 +0000
From: P@draigBrady.com
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To: Nix <nix@esperi.org.uk>
CC: gene.heskett@verizon.net, linux-kernel@vger.kernel.org
Subject: Re: Stupid question
References: <200411212045.51606.gene.heskett@verizon.net>	<41A1F881.1000900@draigBrady.com>	<200411221058.22276.gene.heskett@verizon.net> <87653wydi7.fsf@amaterasu.srvr.nix>
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Nix wrote:
> On 23 Nov 2004, Gene Heskett yowled:
> 
>>On Monday 22 November 2004 09:32, P@draigBrady.com wrote:
>>
>>>Gene Heskett wrote:
>>>
>>>>Greetings;
>>>>
>>>>Silly Q of the day probably, but what do I set in a Makefile for
>>>>the -march=option for building on a 233 mhz Pentium 2?
>>>
>>>http://www.pixelbeat.org/scripts/gcccpuopt
>>
>>Thanks very much.  Obviously someone else needed to scratch this itch 
>>too.  This should produce the correct results when running on the 
>>target machine.  Here, it produces this:
>>[root@coyote CIO-DIO96]# sh ../gcccpuopt
>> -march=athlon-xp -mfpmath=sse -msse -mmmx -m3dnow
> 
> 
> ... which is peculiar, as -mmmx -msse is redundant, as is -mmmx -m3dnow,
> and all three of those flags are the end are implied by -march=athlon-xp
> anyway.
> 
> (-mfpmath=sse *is* useful on non-64-bit platforms, though.)

I added those in so that they were explicit.
They do no harm. I had a version that didn't print
these redundant options but got many requests
about whether they were needed. You can't win.

P?draig.
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